92f3f83a9c
Phases: 1. Foundation: code organization, model extraction (ORG-01–08) 2. Provider migration: setState → ChangeNotifier/Consumer (STATE-01–07) 3. Overlay refactor: fix data staleness, error surfacing (OVRL-01–06) 4. GPS & power: adaptive precision, lifecycle management (GPS-01–04, PWR-01–06) All v1 requirements mapped to phases.